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Ruby Capacitors.....opinions ?

SteelerFan88

Member
Messages
791
I am part sourcing for an upcoming 18w build and would ideally like to use a 33uf/450v as the first power filter cap but can not find anything in that value from my prefered brands (F&T, Sprague) but the Ruby brand can be had fairly cheap at around $5.50 each. I was wondering if any of you have any experience with them ? I may just bump that first stage up to 40uf....Sprague Atom makes one for that I do know.
 

SteelerFan88

Member
Messages
791
They are just re-labelled offshore caps. Likely Chinese. Better off with putting 2 16uf Illinois or F&T together.
Yeah....I was afraid of that. I think I may just "roll my own" wiring up two 16uf in parallel. I have not made the board yet so I can just add another inch to my original layout.....no biggie. Better to use quality now than replacing later :)
 

SteelerFan88

Member
Messages
791
I found some Sprague-Atom 40uf/450v.....that might be just the ticket....not too far from 33uf to make a huge difference. It might stiffen the bass a tad but no biggie :)
 

Mattbedrock

Gold Supporting Member
Messages
4,798
Since most electrolytics are spec'd +50% / -10%, a 40uf may not be any different at all.

Probably heresy, but I'm just saying...
 

Trout

Member
Messages
7,549
I am part sourcing for an upcoming 18w build and would ideally like to use a 33uf/450v as the first power filter cap but can not find anything in that value from my prefered brands (F&T, Sprague) but the Ruby brand can be had fairly cheap at around $5.50 each. I was wondering if any of you have any experience with them ? I may just bump that first stage up to 40uf....Sprague Atom makes one for that I do know.

FT has 30uf/500V available, as mentioned above that is still inside the +/- tolerance rating. Personally I prefer to use the 500V over the 450V caps whenever possible.
http://www.tubesandmore.com/products/C-ET30-500-FT
 

SteelerFan88

Member
Messages
791
my circuit calls for (2) 22uf/450v and (1) 33uf/450v. I think I'll just go with (1) F&T 47uf/500v and (2) F&T 22uf/500v.....The bass will "firm" up a tad so the overall feel might change slightly but then again I may not notice much of a difference at all. I'll try it and see :)
 

wyatt

Member
Messages
4,168
The Ruby Gold is just fine, they seem to have a good enough rep in the DIY hi-fi scene.

Or just use the aforementioned 30uF/500V F&T. With wide-tolerenace electrolytic caps 30uF vs 33uF is pretty much a push.
 

donnyjaguar

Member
Messages
4,194
I have no brand loyalty when it comes to high voltage electrolytics. I also don't recall any failures in the last decade or so. My point I guess is don't let this hold up a repair/build.
 

swiveltung

Senior Member
Messages
14,485
I used some Ruby Gold in an amp build. No issues. I often just use Illinois now, used to use blue Sprague Atoms until I cut one apart, the actual cap inside the case is much smaller than the case is! Not worth the extra money to me now....
 

kevmin

Member
Messages
1,440
When the Sprague Atoms got too spendy for what they are, I switched to F&T and I am very pleased.
 

donnyjaguar

Member
Messages
4,194
Nice on the Atoms - and no surprise. I did a re-cap recently with these. The customer had ordered them with a set of new tubes beforehand. I could tell by their weight that they contained a certain amount of sailboat fuel. :)
 

BassHog

Member
Messages
96
I like the German made Miec electrolytic caps that Just Radios sells. They are inexpensive, great quality, and available in a lot of sizes that you will not find F&T and Spraque caps in. For example, 50uf or 100uf x 600V axial caps.

http://www.justradios.com/cart.html
 

DeaconBlues

Member
Messages
2,975
I've been using F&Ts for the last three cap jobs that I've done and the customers seem very pleased with the performance of their amps.
 






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